Electric switch



H. S. FREEMAN AND F. ZENKER.

ELECTRIC-SWITCH.

APPLICATION 4FILED ocT. 25, |911.

Patented Dec. 13, 1921 N///////.//////\/\//////////////M//%fw SIW@ I QQ bv E. NM, s w @l NN Q R,

uuii'iaiilerares l 1 ,d0-94280. 'l Y v To all wlhom it 'may concern Be it vknown that we, 1Hamer S. FREEMAN,

a..l citizenfof` the United States, residing at Detroit, Ain the county of Wayne and State ofMichigainand F REDRICKZENKER, a vsubject of the Emperor of Germay'residin' at Highland Park, county of ayne, an

have invented acertain new anduseful Improvements in Electric] Switches, of which the following is a fication. Y v

This invention relates to electric fuseholding switches and it has for one'fof itsl tric circuit.

- important objects to provide a' conipact, du-

.rable and inexpensive mechanism a apted to detachably carry a fuse and controlan elec-- Another object f our 'invention ijs'to provide a fuse-holding switch that may be readily assembled from parts substantially all of -v which are .of standard construction. As

such parts may be produced by the usual machinery, they are cheaper than the speialarts which have been formerly used. vIt is, t erefore, an object of the invention to eliminate as many special parts as possible and to limit the switch to a size which is, as nearly the provisiono improved means vwhereby .limited solely state of the art.

as possible, dictated solely bythe size of the. fuse which is to be carried.

Another object of the invention resides in the fuse may be quickl and conveniently atx tached, positioned an detached. Still another object of the invention resides in the construction and positioning of|` the various switch'contacts whereby a com-` pact assembly is obtained.

Other objects will be in part obvious and in part pointed out hereinafter. n g

While our invention may take form in many different embodiments, we 'will describe in detail one of these embodiments venient arrangement of parts and combination of elements for making up the switch. The scope of' our invention is, however, to be by the claims and the prior In the accompanying drawing wherein is shown one of the various possible embodiments of the invention-"- g l f Figure 1 is a viewin side elevation of a switch comprising features of the invention.

Fig, 2 is a view in section taken on the line 2--2 of Fig.' 1,and v PATENT viinncriuc swrrcis. v

speciation of Letters ritiene- ,Patented Dec, 13, -192L Appiicationrled October 25, 1917. Serial 1Vo`.l 1tl8,382.

Fig, 3 is a view in section taken on the line Referring now more particularly to the drawing, there is indicated at 1 a base block ofinsulation, having mounted thereon in relatively spacedrelation a set of standard clip contacts 2 and 3.V In the particular ormshown the contact 2 comprises a flat means of'lat conductor strips 12. Screws 13 and 14 pass through the base'block 1 and `-tap into each of these conductor strips, thereby securingsaidstri and its communicating contact together, an to the b'ase 1. A bindingnut 15'is provided for securing the ter- .minal in electrical 'communication with the conductor strip.

Mounted. for pivotal movement relatively to thebase 1 is a bridging element or carriery 2O of insulating material. This carrier is provided with two fixed anglemembers 21 and 22 of Hat lconducting material.- The 'member 21 has an armor blade 23 secured tothe carrier and an arm or blade 24 adapted to fit between the walls or jaws y7 of the clip contact 2. The blade 24 is'a'pertured` as at 25 toreceive the shank of a pivot bolt 26 which passes through the jawsi? and blade 2lvandfwhich is provided with springwashers 27 adapted to bear upon the` outer sur.-

face of the jaws7 and react against the. head of-the'bolt :26 and Aits coperating nut 30,

the nut being adjustable lto increase or relieve the tensionexerted by'these washers. showing a construction having one con- The angle member 22. has a' blade or arm- Hanny-s, rnnimmgor Diiraoir, my riziinnrcx znNxER, ornieinaim rm.. meinem, assioivoits ro SQUARE COMPANY, osnnrnorr, MICHIGAN, a con- 31 `providinglits area of attachment -to the carrier 20,-and a blade or arm 32 adapted `to be moved, by movement of the carrier, into and out of position between thespaced coinpression jaws 11, the latter being'formed to exert suitable compression to obtain the desirable electrical and retaining connection.

From a consideration of, the -structure so by a pivotal movement of the carrier or bridging element 20 upon its pivot stud 26.

far described, it will be obvious that contacts 2 and 3 maybe mechanically bridged l The bridging element, however,` in the em? bodiment shown, being constructed of insulating material, no electrical communication betweenv the contacts 2 and 3 is provided by this mechanical bridging. To the end, there fore, of providing electrical connection between these contacts a standard clip c'ontact 40 isl mountedy in electrical communication.

with the angle member 21 and is secured thereto,and to the carrier 20,"by means of a screw 41 passing through vthe carrier, the angle member and attaching portions'42 of the contact and tapped into a square nut 43,

' vthe latter being positioned between side walls `44 of the contact 40. In the form shown these side walls 44 are bowed inwardly as at 45 terminating in substantially parallel compression walls 46 having lips 47 at their eX- tremities. The contact clip construction just described' is duplicatedv in electrical communication with the angle member 22 as indicated at 50, this contact being secured to thecarrier by a screw 51. For convenience,

the contacts 40 and 50 may be termed the fuse-holding contacts whereas the four 1re-vl maining contacts comprising-clipsj2 and 3 and angle members 21 and 22 maybe termed the circuit-controlling contacts.

In' each of thevcontacts 40 and 51 where one of the side wallst44' meets one ofthe jaws, a piece is struck inwardly asat 52, to

serve as a i limiting stopor the fuseknieblade termjinalsand facilitate the correct po- -sitioning of the fuse relatively to the fuseholding contacts.- en'd of the base opp osite the pivotal connectionfis provided with anupturned lip 53 aga-inst which the end: of the Ablade'32 will nal through `member21, clipcontact 40, fuse 60, clip conand opposite conductor 12. Should the fuse .blow, Y

bring up inthe pivotal movement of the carrier to closed circuit position.

The fuse in the form shown lis indicated generally as at and is provided with metal end clips 61 and flattened knife-blade terminals 62 and 63 whichconnect in thev usual waywith the fusible link within the inclo.

suie,64. l i

With' the parts as in Fig. 1' an electrical circuit is completed from-terminal to termicinductor 12, contact2, angle tact 50, angle member 22, contact 3 .The conductor 12 at the handle 65, thereby mechanically unbridging the contacts 2 and 3. This movement might be. continued about the ivot 26 until thc fuse became easily accessilli operator could withdraw the blown fuse, substitute a new one by inserting the knifeblade terminals-thereof between the lips of `the fuse-holding clip contacts and mo-ve the fuse inwardly between the jaws of these contactS until further movement was prevented by the limiting stops52; The operator could' then move the carrier in the opposite direction causingrengagement of the contact 32 with the Walls orjaws 11 of the contact 3,

Vwhereupon the electrical circuit is reestablished between'the terminals. l

Attentionis directed to the fact that in the form shown the pivot is independent of either of the fuse-holding clips; that the fuse itself has. no part in establishing the pivotal relation between the contacts 2 and are not called upon to take` partmechanian operator could move the carrier into open circuit position. by means of the operatingv le, whereupon the l vet v21 and that the fuse-holding clip contacts cally in the circuit-completing action. These v fuse-holding clip contacts are laterally offset relatively to the4 contacts which coperate to complete and interrupt theV circuit.

-As many changes could be made in the above construction and as many apparently widely different embodiments of the inven- -tion could be made without departing from the'scope thereof, it is intended that all matter set forth in the foregoing description or .shown in the accompanying drawings shall lof'each of vsaid `L-sha'ped members being in engagement with said contacts in one position of the bridging member, and clip members adapted to receive a fattenedmember attached to the other leg of said L-shaped' member. v

HARRY Si FREEMAN. FREDRICK ZENKER. 

